已知点
,
,动点
满足直线
与直线
的斜率之积为
.
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922778336149504/2927405562617856/STEM/4b6aeb8c145f4d98b35b0d80f50d277f.png?resizew=176)
(1)求动点
的轨迹的方程;
(2)如图,当动点
位于
轴左侧时,抛物线
:
上存在不同的两点
满足线段
的中点均在
上.
①设
的中点为
,证明:直线
垂直于
轴;
②求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb66dc6f2da7251ee614987a6066065e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd8e59c5bdcabc589c42456725ca881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922778336149504/2927405562617856/STEM/4b6aeb8c145f4d98b35b0d80f50d277f.png?resizew=176)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)如图,当动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b1113864968119e61aeee9ba9c613b.png)
更新时间:2022-03-02 09:24:46
|
相似题推荐
解答题-问答题
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解题方法
【推荐1】已知圆
,与x轴不重合的直线l过点
,且与圆
交于C、D两点,过点
作
的平行线交线段
于点M.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/1a9f8881-c093-43f4-8ce3-865e485e61aa.png?resizew=161)
(1)判断
与圆
的半径的大小关系,求点M的轨迹E的方程;
(2)已知点
,直线m过点
,与曲线E交于两点N、R(点N、R位于直线
异侧),求四边形
的面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7b49fd240f4c33e54bebfc54c69a748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3a50c57a5c8c8af58ec03890f9f50a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/1a9f8881-c093-43f4-8ce3-865e485e61aa.png?resizew=161)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5ec5ddde9323ff89a4185226146089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f4903796e8f44456ebf2ef60643135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa04eb7cae40ce5e89da590b9cdb75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01dd23cb4a48a960b02495f68180db4e.png)
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【推荐2】在平面直角坐标系中,用
表示直线
与直线
的斜率之积,已知
,
,记点
的轨迹为
.
(1)求轨迹
的方程;
(2)
为轨迹
上的两点,
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4099a1ee13065015f12b874552e310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809d0995ba045a19865e23a49afebd17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求轨迹
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438031b12f2f3e4c8221d543ff9e7fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
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解答题-问答题
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较难
(0.4)
解题方法
【推荐1】已知
,
是椭圆
的左、右焦点,弦
经过点
,若
,
,且
的面积为2.
(1)求椭圆的方程;
(2)若直线
,与
轴交于点
,与椭圆
交于
,
两点,线段
的垂直平分线与
轴交于点
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982f45f1e93652d6ac6d3a2035b3e505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c824745f9c2cdc311f0c745bffa2749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9116e096dea74380db2b76e5de6b47c2.png)
(1)求椭圆的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d711b6ec0f2fa0030cd1cb8360c813ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ca989fde677d756f43ae80be053e2a.png)
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【推荐2】设椭圆
的左、右焦点分别为
、
,上顶点为
,在
轴负半轴上有一点
,满足
为线段
的中点,且
.
(1)求椭圆
的离心率;
(2)若过
、
、
三点的圆与直线
相切,求椭圆
的方程;
(3)在(2)的条件下,过右焦点
作斜率为
的直线与椭圆
交于
、
两点,在
轴上是否存在点
使得以
、
为邻边的平行四边形是菱形?如果存在,求出
的取值范围,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3656055f5256cd06e636ea96e9f89c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8174c73ce27865ba2ec48d337be275.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec7b952777ec781a1a13a356b95e53a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)在(2)的条件下,过右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bfec4efcc9f0e656d6864daaaef55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知抛物线
上的点
与
的距离
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/e568bc5f-fc89-43df-bdfe-7b8c7d25c35b.png?resizew=146)
(1)求抛物线E方程;
(2)若
,直线
与抛物线交于
两点,P为抛物线上不同于
的动点,直线
,
分别交直线
于M,N两点,且M,N的纵坐标之积为
,直线
是否过定点,请求出此定点;若不过定点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b527ec9f92467b8f24554a2a67ee987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51cb5ed8c5f7f1d9795d80bb83a577cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2dbbdfc65066e009e31850bb8648cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac43806f62c3d6b8db77b252c364986.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/12/e568bc5f-fc89-43df-bdfe-7b8c7d25c35b.png?resizew=146)
(1)求抛物线E方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce17d604dad52be4554ccd16e90bd3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b9a5f1362c12e1ea8f6fc0d9d787ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-问答题
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【推荐2】已知F为抛物线C的焦点,过F的直线
交C于A,B两点,点D在C上,使得
的重心G在x轴的正半轴上,直线
,
分别交
轴于Q,P两点.O为坐标原点,当
时,
.
(1)求C的标准方程.
(2)记P,G,Q的横坐标分别为
,
,
,判断
是否为定值.若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ebf992b3322f2d8b2ee986f67a6af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
(1)求C的标准方程.
(2)记P,G,Q的横坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2297930d54a0452220d963bfef6a616a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c01080a37368247d111980a599ec40f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c15a90db6dfd1aab79a3728748cc6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e82c2aafbfeffc2d952aead8d16382.png)
您最近一年使用:0次